12 Planets in Sumerian Thought?

Does the cylinder seal above convey the fact that
the Sumerians who fashioned it knew of 12 planets in our solar
system? That's what Zecharia Sitchin claims about the seal.
But he's wrong, and it isn't difficult to demonstrate. All one
has to do to agree with Sitchin here is (a) ignore what the seal
says; (b) ignore what is known about Sumerian astronomy from
cuneiform astronomical texts (all published, but in scholarly
books); and ignore standard Sumerian iconography -- artistic
representations of stars. That's all.

VA243

The cylinder seal is now in a museum in Berlin. It
goes by the number "VA243".
Here's an analysis of the seal in PDF.